<?php

namespace Framework;

use PDO;

class Database{
    public $conn;

    
    // Database 类构造器

    // @param array $config

    public function __construct($config){
        $dsn = "mysql:host={$config['host']};port={$config['port']};
        dbname={$config['dbname']}";

        $options = [
            PDO::ATTR_ERRMODE => PDO::ERRMODE_EXCEPTION,
            PDO::ATTR_DEFAULT_FETCH_MODE => PDO::FETCH_OBJ
        ];

        try{
            $this->conn = new PDO($dsn,$config['username'],
            $config['password'],$options);
            
        }catch (\PDOException $e){
            throw new \Exception("数据库连接失败：{$e->getMessage()}");
        }
    }

    // 执行数据库请求

    // @param string $query
    // @return PDOStatement
    // @throws PDOException

    public function query($query,$params = []){
        try{
            $sth = $this->conn->prepare($query);

            foreach($params as $param => $value){
                $sth->bindValue(':' . $param,$value);
            }

            $sth->execute();
            return $sth;
        }catch(\PDOException $e){
            throw new \Exception("数据库请求失败：{$e->getMessage()}");
        }
    }
}